public class PropertyPlaceholderHelper extends Object
${name}
. Using PropertyPlaceholderHelper
these placeholders can be substituted for
user-supplied values. Values for substitution can be supplied using a Properties
instance or
using a PropertyPlaceholderHelper.PlaceholderResolver
.
Modifier and Type | Class and Description |
---|---|
static interface |
PropertyPlaceholderHelper.PlaceholderResolver
Strategy interface used to resolve replacement values for placeholders contained in Strings.
|
Constructor and Description |
---|
PropertyPlaceholderHelper(String placeholderPrefix,
String placeholderSuffix)
Creates a new
PropertyPlaceholderHelper that uses the supplied prefix and suffix. |
PropertyPlaceholderHelper(String placeholderPrefix,
String placeholderSuffix,
String valueSeparator,
boolean ignoreUnresolvablePlaceholders)
Creates a new
PropertyPlaceholderHelper that uses the supplied prefix and suffix. |
Modifier and Type | Method and Description |
---|---|
protected String |
parseStringValue(String strVal,
PropertyPlaceholderHelper.PlaceholderResolver placeholderResolver,
Set<String> visitedPlaceholders) |
String |
replacePlaceholders(String value,
Properties properties)
Replaces all placeholders of format
${name} with the corresponding
property from the supplied Properties . |
String |
replacePlaceholders(String value,
PropertyPlaceholderHelper.PlaceholderResolver placeholderResolver)
Replaces all placeholders of format
${name} with the value returned
from the supplied PropertyPlaceholderHelper.PlaceholderResolver . |
public PropertyPlaceholderHelper(String placeholderPrefix, String placeholderSuffix)
PropertyPlaceholderHelper
that uses the supplied prefix and suffix.
Unresolvable placeholders are ignored.placeholderPrefix
- the prefix that denotes the start of a placeholderplaceholderSuffix
- the suffix that denotes the end of a placeholderpublic PropertyPlaceholderHelper(String placeholderPrefix, String placeholderSuffix, String valueSeparator, boolean ignoreUnresolvablePlaceholders)
PropertyPlaceholderHelper
that uses the supplied prefix and suffix.placeholderPrefix
- the prefix that denotes the start of a placeholderplaceholderSuffix
- the suffix that denotes the end of a placeholdervalueSeparator
- the separating character between the placeholder variable
and the associated default value, if anyignoreUnresolvablePlaceholders
- indicates whether unresolvable placeholders should
be ignored (true
) or cause an exception (false
)public String replacePlaceholders(String value, Properties properties)
${name}
with the corresponding
property from the supplied Properties
.value
- the value containing the placeholders to be replacedproperties
- the Properties
to use for replacementpublic String replacePlaceholders(String value, PropertyPlaceholderHelper.PlaceholderResolver placeholderResolver)
${name}
with the value returned
from the supplied PropertyPlaceholderHelper.PlaceholderResolver
.value
- the value containing the placeholders to be replacedplaceholderResolver
- the PlaceholderResolver
to use for replacementprotected String parseStringValue(String strVal, PropertyPlaceholderHelper.PlaceholderResolver placeholderResolver, Set<String> visitedPlaceholders)